Park Jin-young, left, singer and head of JYP Entertainment in Seoul, teams up with Yoo Jae-suk, a member of the popular television entertainment program "Infinite Challenge," or "Muhan Dojeon" in Korean, to perform "I'm So Sexy" during the 2015 Infinite Challenge Music Festival held at the Alpensia Ski Jumping Tower in PyeongChang, Gangwon Province, Aug. 13.